You are doing great and should focus on relaxing when you can. Getting stressed this way isn’t healthy. You are taking a challenging course and still doing well in it! Most colleges look at you as a whole person, not just narrowly at grades (and your grades are great!) Focus on figuring out what you like and which colleges you think will be a good match for you both academically and socially as well as financially. It is good you are having this experience now. Kids who don’t ever struggle at all and then go to college may not be as prepared. Use this as a way to know yourself more and what you want.